Using semen and blood samples of 1,210 men, researchers from the University of Copenhagen determined that guys who watched five or more hours of TV per day had 37 million sperm/milliliter on average, while those who didn't watch TV had 52 million. (Anywhere from 40 million to 300 million is considered normal.) Those who watched more TV also had less testosterone and more follicle-stimulating hormone, which leads to sperm production.

You might blame the physical inactivity associated with television-watching, but weirdly, spending a lot of time in front of the computer did not affect sperm count. And overall, guys with higher sperm count weren't more physically active, although they tended to consider themselves more fit. On top of U.K. report having less sex than they did in 1990.

The study didn't answer exactly how too many Game of Thrones binge-watching sessions connects to lower sperm counts, but the data it presents makes a strong argument for date night plans that aren't Netflix and chill.